Apparatus for forging car-wheel treads.



UNrrEn STATES PATENT AloisEioE.-

fJoHN M. HANSEN; 9E PITTSBURG, PENNSYEVANA, AssIeNon To EoRGED STEEL WHEEL COMPANY, OF PITTSVBURG, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

APPAnATUsFon EORGING CAR-WHEEL TREAns .g Specification of Letters Patent.

Patented Sept. 1'7, 1907.

Application filed May 19,1906. Serial No. 317,735.

To all whom it may concern:

' Be it known that I,-.ToHN M. HANSEN, a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania. have invented a new and useful Improvement in Apparatus for Forging Car-Wheel Treads; and I do hereby declare the following to be a full, clear, end exac't description thereof.

My invention 'relates to dies for forming Wheel blanks, its object being to provide suitable dies for forging a previously formed wheel blank and forming on the same a combined tread and flange, the apparatus being suitable for carrying out part of the method described in an application filed by me of even date.

herewith, Serial No. 317,733. Inconnection withthe said method set forth in said application ay blank is formed having a rim' or tread forming portion projecting in line with the axis of the bla-nk.

The main object of the present invention is to s0. forge said rim portion as to develop from the same rim, a tread and flange of the wheel, and subject the same to such'work as to condense the metal of said `tread'and flange, compact it and obliterate any flaws contained in it and produce a tough, "strong fiange of high wearing qualities.

lt comprises, generally stated, a male die having an annular projecting portion to support the web of the blank, and substantially vertical side walls against which the rim portion of the blank fits., together with a central hub recess, and corresponding dished or female die having a hub cavity, an inclined web forming face outside of the hub cavity, and an annular flange forming recess, and means for forcing the tread portion of the blank inwardly to form the tread and outwardly to form the flange, such as an annular follower die around the male die provided with an annular recess having an outwardly inclined face conforming to the shape of the tread of the wheel and flaring flange forming recess beyond the same.

It also consists in the combination of certain parts of the die construction above outlined, as hereafter more fully set forth and claimed.

In the accompanying drawings Figure l is a vertical section showing the different parts of the dies, the blank boing confined between the male die and the female die, and before the forging of the rim; F ig. 2 shows the dics after the forging of the rim; Fig. 3 is an enlarged detail 'view of a portion of the wheel showing it after forging in full lines, and before forging vin dotted lines; Fig. 4 is a View of the dies where the outer annular die is connected to and forms part of the male die, the dies being open; and Fig. 5 is a like view ofthe dies closed.

In order to make clear the operation of the said dies l will describe the blank operated upon and the construction of the dies andthe steps followed in forging the same. ferred to employ my invention is prepared by a' previous die forging operation fully described' in said application Serial No. 317,733, said-blank having the central hub portion-l, the web portion 2 and the rim or tread forming portion 3, said tread formingl portion containing sulcient metal` for the development of the tread with its flange, and said tread forming portion The original blank with which it is preextending substantially parallel with the axis of the I blank. 'As the blank is first forged it may be of suitable internal diameter to fit over the male 'die 4 or slightly less than that so that when the blank is clamped between the male die 4 and the female die 5 it may be spread somewhat asv its tread forming portion is forced around the male die 4. This blank is raised to a suitable forging heat and is then placed over the male die 4 and thefernale die 5 is brought down upon it, clamping it 'ready for the tread forging step, as shown in Fig. l. curved annular projection 6 and the central hub cavity 7 into which a portion of the hub l enters as shown. It also has the central opening 8 into which the mandrel 9 fits, said mandrel 9 as .illustrated in said figure, preferably passing through a like opening in the female die 5, and being independently' operated by the said dies, so that it supports the eye of the hub. The female die 5 has the hub cavity l0 to envelop and support the hub projecting on that side of the blank. Beyond the saine is the curved-concave die. face l1 connected to the hub cavit'ly a curvedface, this die face ll. confining the web portion ofthe blank. Beyond said die face 1l is the annular flange forming recess l2, separated from the web face l11 by the curved annular projection 13.

Back of the curved annular projection 6 of the male die is the vertical face 14 and/fitting around the saine is the annular tread forming die l5 having the tread forming cavity 16 shown as provided with a straight 'base 17, and having the outwardly inclined tread forming face 18 conforming in shape to the tread of the wheel, while beyond the same is the fiaring flange forming cavity 19. It will be noticed that the space The male die 4 Ahas the between the vertical face 14 of the male die and the backwardly lo lili the flange forming 'cavity formed by the annular recess l2 in the female die and the flaring recess i9 oi' the annular follower die 15, the metal being thus first forced inwardly and backwardly so as to formthe tread of vthe wheel blank and to center the tread with relation to the web, and then to spread 'the metal out into the said flange forming cavity, so completing `the vformation-'of the tread and flange of the Wheel, and distrihutingthe metal 'piroperly throughout this portionof the blank, In this way heavy work is brought upon the tread of the blank, compacting and hardening it and developing the desired fiber structure therein to give high wearing qualities. In these dies, if desired, further compression may be brought upon the hub portion of the blank, bringing it to exact finished shape. To coniplete the Wheel it is only necessary to properly dish it, giving the desired reverse curve to the web and setting the hub and tread in proper relation as described in said method application, Serial No. 317,733, it being preferred that thisoperation is performed when the wheel is at a lower temperature, and that a further upsetting of the tread and flange portion of the wheel and further densifying and compacting thereof take place, as described in said application.

The dies in Fig. 4 show a modification oi the invention in which the female die 22 isof substantially the same shape as shown in the other figures, but the male die and tread forming die are formed in one, the curve `of the annular projectionZS of the male die 24 meeting at the base of the tread'lforming cavity 25 while beyond' the same is the outwardly inclinedA face 26 extending to the outwardly flaring flange forming cavity 27. The mandrel 28 extends upwardly through the female die which in this'case 'is the anvil die, that die having th? hub forming cavity 29, the web forming or supporting face 30 and the annular depresgsion 3l acting with the flaring cavity 27 to form the flange cavity. In the use of this form of` dies the blank can be of substantially the same shape as that shown in connection with the other figures, or it may be such as shown in said Fig. 4, the rudimentary` hub portion 32 extending Wholly on one side of the blank so thatjas thel dies are. brought together this rudimentary hub may be upset between the hub forming or supporting cavities 29 and 29, and the completed i y hub thus formed roni'the rudimentary hub 32 while the rim forming portion '34is upset within the tread forming cavity and the flange iormingcavitiesin substantially the same manner as above described in connection with the other figures.

What I claim is:

1. Dies for forging wheel treads or rims having clamping faces adapted to clamp the web portion of the blank, one of the dies having :in annular' outwardly inclined forging face conforming in shape to the tread.y of the wheel, and acting to force the metal inwardly and so compact the metal while forming the tread face of the wheel. 2. Dies for forging whe-el treads or rims havingI ciamping faces adapted to clamp the web portion of the blank, one o f the dies having an annular outwardly inclined forging face conforming in shape to the tread of the wheel and acting to force the metal inwardly and so compact the metal while forming the tread face of the wheel, and having a flaring flange forgingv face beyond the tread forging face, the opposing d ie having an annular' Bange forging recess beyond its web clamping face.

3. Dies for forging wheel treads or rimsQhaving male i and female web clamping faces, .one ofthe dies having an annular outwardly inclined forging face conforming in shape to the tread'of the wheel metal inwardly and so'compact-the metal while forming the trend face. l 'Y 4. ln apparatus f 'onlo'rging Wheel'treads, the'zombinntion of a female die having a hub cavity andan inclined webclaniping face outside thereof, n'male die having an annular curved web clamping projectlomand an independently acting annular follower' die around the male' die and provided with an outwardly inclined tread forginf.r face conforming in shape tothe tread of the wheel and acting to force the metal inwardly and backwardly and so compact the metal while forming the tread face of the wheel.

`5, lIn apparatus for forming wheel treads, the combina- 'tion of a female die having a huh cavity, an inclined web forming face outside thereof, :ind an annular flange forming recess, a male die having an annular' curved projection and an independently acting' annular follo'wer die around the male die provided with an annular' recess having an outwardly inclined tread forging face and a tlaring iinnge forging face'lxeyond the same. y

d. Dies for forging wheel treads or rims shaped to hold the rim portion turned toward one side, and having clamping lfaces to clamp the web portion oi the blank, one of the dies having,r an annular outwardly inclined forging face conforming in shape to the tread oi the wheel, und acting to force the metal of the turned rim portion inwardly and thereby compact the metal while forming the fread face of the wheel.

In testimony whereof, I the said JonN M. HANSEN have I hereunto set my hand.,

JOHN M. HANSEN. Witnesses F. W. WINTER, Ronnn'r C. ToTTnN,

and acting to forcethe 

